Something mellow but not necessarily just "comfy fluff", then? Here's a few I can think of that could fit the bill:
Undercurrent (his short story collections, like Goggle, are good too)
Neko ga Nishi Mukya
Kowloon Generic Romance
Matsumoto Taiyou-illustrated SoLs (Takemitsu Zamurai, Ping Pong...